Angled Spoiler Surfaces for Wiper Blade Aerodynamics
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Solution Overview
Problem
Conventional wiper blades experience reduced effectiveness at high speeds due to turbulence and spray mist creation, and at medium speeds, a simple height reduction compromises spoiler performance.
Innovation Solution
A spoiler with at least two flat surfaces arranged at an angle, forming a common inflow profile, which reduces spray mist and enhances airflow, combined with a third surface that encloses an angle to further improve airflow and reduce 'water pull-back' effect, while maintaining a compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the overall height of the spoiler is reduced, then the compact structure is improved, but the spoiler effectiveness in the medium speed range is reduced
Solution Approach 1:
The spoiler transitions from a conventional single-surface design to a multi-surface three-dimensional structure with first and second surfaces arranged at an angle to each other. This angular configuration creates a common inflow profile that effectively utilizes airflow in multiple dimensions, maintaining spoiler effectiveness while reducing overall height.
Solution Approach 2:
The invention changes the geometric parameters of the spoiler by introducing angular relationships between surfaces rather than using a single flat surface. The specific angle between the first and second surfaces optimizes airflow deflection characteristics, allowing the reduced-height structure to maintain aerodynamic effectiveness.
2Force
If a conventional spoiler design is used, then the contact pressure is increased at higher vehicle speeds, but turbulence occurs behind the spoiler and creates spray mist that wets the windshield
Solution Approach 1:
The spoiler is segmented into multiple distinct surfaces (first surface, second surface, and third surface) arranged at specific angles to each other. This segmentation allows each surface to perform a specific function in managing airflow, with the angular configuration creating controlled flow patterns that prevent turbulence and spray mist formation while maintaining contact pressure.
3Volume of moving object
If the wiper blade is designed with a compact structure, then the overall height is reduced, but the airflow management and wiping quality may be compromised
Solution Approach 1:
The compact spoiler design achieves effective airflow management in a reduced height by utilizing angular relationships between multiple surfaces. The first and second surfaces arranged at an angle create a three-dimensional inflow profile that effectively directs airflow without requiring significant height, thereby maintaining wiping quality in a compact structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures effective performance in the medium speed range, minimizes spray mist at high speeds, and reduces 'water pull-back' effect, enhancing wiping quality and maintaining a reduced overall height.
Implementation Method 1
the air flow generated by the airflow is deflected more strongly in the central area of the wiper field and channeled better at the reversal point of the wiper blade
Implementation Method 2
at very high speeds, at which turbulence occurs behind the spoiler and creates a spray mist
Implementation Method 3
an elongate, spring-elastic support element, this is intended to ensure the most uniform possible distribution of the wiper blade contact pressure on the window
Implementation Method 4
the ends of the wiper strip, which is completely in contact with the window during operation of the wiper blade, are loaded by the then tensioned support element towards the window
Data Source
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AI summary
The invention relates to a wiper blade (10) having at least one elongated support element (12), on which a wiper strip (24) and a spoiler (34) are arranged along the longitudinal extension thereof. It is proposed that the spoiler (34) comprise at least one first and one second substantially flat surface (36, 38, 46, 58), which are arranged at an angle (40, 48, 84) to each other and which form a common incident flow profile (41) in the installed state.